article 2 sec 1
No Person except a natural born Citizen, or a Citizen of the United States, at the time of the Adoption of this Constitution, shall be eligible to the Office of President; neither shall any person be eligible to that Office who shall not have attained to the Age of thirty five Years, and been fourteen Years a Resident within the United States.
In Case of the Removal of the President from Office, or of his Death, Resignation, or Inability to discharge the Powers and Duties of the said Office, the Same shall devolve on the Vice President, and the Congress may by Law provide for the Case of Removal, Death, Resignation or Inability, both of the President and Vice President, declaring what Officer shall then act as President, and such Officer shall act accordingly, until the Disability be removed, or a President shall be elected.
http://en.wikipedia.org/wiki/Vice_President_of_the_United_StatesThe Twelfth Amendment to the United States Constitution requires the vice president to meet the same eligibility requirements as the president. That is, the vice president must be at least 35 years of age, a natural born citizen, and a resident of the U.S. for 14 years. The Twenty-second Amendment limits the president to only two terms in office. (Any period of service in the office of president, having succeeded from the vice presidency, counts as one term if it is for two years or more.) Thus, the maximum number of years a person may serve as president is ten years (two full four-year terms and one two-year term having succeeded to the presidency). Once a person is ineligible for the office of president, he is also ineligible for the office of vice president.
here's the link to the 22 amendment just FYI
http://en.wikipedia.org/wiki/Twenty-second_Amendment_to_the_United_States_ConstitutionPeace